applyMixingFrom方法的 switch-case 块, default case 存在 let t = n[p] 覆盖 else 分支声明的 let t = a.timelineMode
这个是 else 分支编译后的代码，此时，执行到 default 时会导致后续的 t.mixTime 报错
{let t=a.timelineMode,n=a.timelineHoldMix,u=a.shortestRotation,g=!u&&a.timelinesRotation.length!=l<<1;g&&(a.timelinesRotation.length=l<<1),a.totalAlpha=0;for(let p=0;p<l;p++){let l,x=o[p],w=exports.MixDirection.mixOut,b=0;switch(t[p]){case qt:if(!i&&x instanceof kt)continue;l=s,b=c;break;case Ut:l=exports.MixBlend.setup,b=c;break;case Wt:l=s,b=h;break;case zt:l=exports.MixBlend.setup,b=h;break;default:l=exports.MixBlend.setup;let t=n[p];b=h*Math.max(0,1-t.mixTime/t.mixDuration);}

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TypeError: Cannot read property 'mixTime' of undefined
at Vt.applyMixingFrom
这里是报错的详细信息

    jtabibito

    Hello and thanks for reaching us.
    The code you are referring to is this one.

    I cannot reproduce the error you are reporting. Can you share the assets triggering the error? If you cannot share them here directly, you can send them via email at contact@esotericsoftware.com.

        Davide Sorry abount this question, this issue seems to be caused by our use of terser for code compression. We are currently trying other tools.

            jtabibito

            There's no need to say sorry 🙂 Sometimes it happens that some particular animations lead to unexpected results, and it's always appreciated when users report the issues to us.